Length Matters: Short Base-Plate Angle Guides May Lead to Guide-Wire Mal-Positioning When Inserting a DHS. A Radiographic Modeling Study

The dynamic hip screw (DHS) consists of a barrel-plate fixed to the relatively-straight proximal femoral shaft, and a screw which slides within the barrel at a fixed angle, usually 135°. The guide-wire is inserted using a guide at the set angle. Guide design varies between manufacturers, with some new guides being particularly short. We analysed the impact of guide design on the resulting trajectory of the guidewire, and its potential to cause a surgical error. Twenty AP hip radiographs were analysed. Trauma Cad (Brainlab, Munich, Germany) software was used to template a 4-hole 135° DHS onto the intact femur with the screw positioned in the center of the head. A template of a Stryker (Michigan, USA) 135° DHS guide (37 mm long) was then overlaid at the hip screw entry point, and the set trajectory marked. The divergence between the two trajectories was measured (α angle). The distance the guide would have to be moved inferiorly to attain the correct position in the head was then noted. The median divergence (α angle) caused by the guide relative to the ideal position was 6° (range 2–12). This led to the guidewire placement being a median of 9.1 mm (range 3–23) superior in the head (β).To achieve the correct position of the wire in the head, the guide needed to be moved inferiorly a median of 8 mm (range 2–10). © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:574–577, 2020     

糖尿病患者白内障术后视功能与术前HbA1c值的相关性研究

目的:探究糖尿病患者白内障术后黄斑区视网膜结构、脉络膜结构及最佳矫正视力与术前HbA1c值的相关性。方法:临床病例对照研究。选择2016-10/2017-12在青岛市市立医院眼科中心符合入组条件的超声乳化白内障患者82例87眼,分为非糖尿病组和糖尿病组。依据术前HbA1c水平,将糖尿病组分为高HbA1c值组(HbA1c>7.0%)和正常HbA1c值组(HbA1c≤7.0%)。其中非糖尿病组(4%≤HbA1c≤6.0%)28例30眼,高HbA1c组28例29眼和正常HbA1c组26例28眼。运用频域光相干断层扫描(SD-OCT)检查各组患者术前1d,术后1d,1wk,1、3mo时黄斑中心凹视网膜厚度(CST)、黄斑总容积(CV)和黄斑中心凹脉络膜厚度(SFCT),采用多因素重复测量方差分析其变化,Pearson相关分析探究其与HbA1c值的相关性;同时比较各组患者术后黄斑水肿(PCME)发生率;进一步分析糖尿病患者HbA1c值与术后最佳矫正视力(CDVA)的关联性。结果:非糖尿病组、高HbA1c组和正常HbA1c组患者白内障术后1wk时CST分别为239.03±11.55、254.38±26.44、247.07±19.51μm,术后1mo时CST分别为241.00±11.15、271.55±61.05、248.64±38.28μm(F=3.001,P=0.048);其中高HbA1c值组和正常HbA1c值组比较有差异(P<0.05),且两组患者术后1wk,1mo时HbA1c值与CST之间在P=0.01水平上呈正相关关系(r术后1wk=0.338,r术后1mo=0.297)。三组患者术后发生PCME分别为0例、5眼(17%)和1眼(4%)。非糖尿病组、高HbA1c组和正常HbA1c组患者术后1wk时CDVA分别为0.07±0.06、0.12±0.10、0.09±0.08,术后1mo时CDVA分别为0.03±0.06、0.11±0.15、0.11±0.09,术后3mo时CDVA分别为0.02±0.04、0.08±0.12、0.06±0.06(F=3.272,P=0.045);其中高HbA1c值组和正常HbA1c值组比较无差异(P>0.05),两组患者HbA1c值与术后1wk,1、3mo(r术后1wk=0.425,r术后1mo=0.235,r术后3mo=0.332)CDVA(LogMAR)在P=0.01水平上两者显著相关且呈正相关关系。三组患者白内障术后CV、SFCT的组间变化趋势大致相同,其变化程度的组间无差异。结论:糖尿病患者术前HbA1c水平与超声乳化白内障术后黄斑区视网膜和脉络膜结构有一定的相关性;术前HbA1c>7.0%的患者术后发生黄斑水肿的风险增加。同时,糖尿病患者术前HbA1c水平与白内障术后最佳矫正视力密切相关;术前HbA1c值越高的患者术后视力提高越欠佳。     

“勾股定理”测量的左右心室电极间距离与心脏再同步化治疗临床疗效的相关性和预测性分析

【摘要】背景：再同步化治疗能改善心力衰竭患者的预后,但大约有1/3患者不能从中获益,也就是无反应者。目的：探讨在勾股定理方法测量下的实际左右心室电极间距离与心脏再同步化治疗临床疗效的相关性和预测性。方法：回顾性的研究在我院所有因符合CRT指征而行CRT植入术的患者,采集患者术前、术后6个月基本资料（年龄、左心室射血分数（LVEF）、左心室舒张末内径（LVEDD）、左心房前后径（LAAPD）、QRS 时限（QRSd）、N-端脑利钠肽前体(NT-proBNP)、美国纽约心脏病协会（NYHA）心功能分级等）;在术后的透视影像下,用游标卡尺测量正侧位左右心室间电极直接距离（L）（水平距离 V ,垂直距离 H）,正前位心脏横径（C）、胸腔横径（T）,根据勾股定理左、右心室电极植入位置间直接距离（DD2=V12+L22）或（DD2=V22+L12）;计算左、右心室电极植入位置间 DD/C。并根据术后心脏彩超变化或临床症状评估分为显著有效（A组）,有效（B组）和无效（C组）。结果：共有108个患者（平均年龄 64.34±9.35岁,51.9%男性,57.4%扩心病）纳入研究,A组（31）、有效组（56）和无效组（31）;三组患者术后6月的LVEF、6-MWT、LVEDD、QRSd、NT-ProBNP较术前均有明显改善（P＜0.05）,DD及DD/C在组内及组间均有统计学意义（P＜0.05）;且A组＞B组＞C组;多因素Logistic回归分析示DD和DD/C是CRT临床疗效的独立影响因素;在ROC曲线分析中,DD（DD/C）曲线下面积分别为0.709（0.713）和0.741（0.835）,A组和B组、B组和C组之间的DD（DD/C）截断值分别为54.84mm（0.551）和43.5mm（0.395）（P＜0.05）。结论：在勾股定理方法测量下的实际心室间电极距离与CRT临床疗效呈正相关,DD（DD/C）越大,CRT临床效果越好,并且也是预测CRT临床效果的预测因素。     

Exercise Therapy in Addition to an Orthosis Reduces Pain More Than an Orthosis Alone in Patients With Thumb Base Osteoarthritis: A Propensity Score Matching Study

ObjectiveTo compare the effect of exercises and orthotics with orthotics alone on pain and hand function in patients with first carpometacarpal joint (CMC-1) osteoarthritis (OA) and to predict outcomes on pain and hand function of exercises and orthotics.DesignProspective cohort study with propensity score matching.SettingData collection took place in 13 outpatient clinics for hand surgery and hand therapy in The Netherlands.ParticipantsA consecutive, population-based sample of patients with CMC-1 OA (N=173) was included in this study, of which 84 were matched on baseline demographics and baseline primary outcomes.InterventionsExercises and orthotics versus orthotics alone.Main Outcome MeasuresPrimary outcomes included pain and hand function at 3 months, measured using visual analog scale (VAS, 0-100) and the Michigan Hand Outcomes Questionnaire (MHQ, 0-100).ResultsA larger decrease in VAS pain at rest (11.1 points difference; 95% confidence interval, 1.9-20.3; P=.002) and during physical load (22.7 points difference; 95% confidence interval, 13.6-31.0; P<.001) was found in the exercise + orthotic group compared to the orthotic group. In addition, larger improvement was found for the MHQ subscales pain, work performance, aesthetics, and satisfaction in the exercise + orthotic group. No differences were found on other outcomes. Baseline scores of metacarpophalangeal flexion, presence of scaphotrapeziotrapezoid OA, VAS pain at rest, heavy physical labor, and MHQ total predicted primary outcomes for the total exercise + orthotic group (N=131).ConclusionsNon-surgical treatment of patients with CMC-1 OA should include exercises, since there is a relatively large treatment effect compared to using an orthosis alone. Future research should study exercises and predictors in a more standardized setting to confirm this finding.     

Closer: A videoconference intervention for distance caregivers of cancer patients

Distance caregivers (DCGs) represent a growing demographic. The emotional burden of caregiving for a family member with cancer is amplified by the logistical challenges of providing support from afar. DCGs feel higher levels of distress, anxiety, and depression compared with local caregivers. Videoconference technology may alleviate both the emotional and practical burdens faced by DCGs. This is an ongoing randomized controlled trial in 32 outpatient ambulatory clinics at a large, urban, comprehensive cancer center. To date, 332 patient‐DCG dyads have been enrolled. DCGs must have internet access and have been identified by the patient as a source of support. The intervention period is 4 months. DCGs are randomized to one of three arms: DCGs in Arm 1 receive four coaching sessions with an advanced practice nurse or social worker and four videoconference appointments during the oncologist‐patient office visit. DCGs in Arm 2 participate in four videoconference appointments with the oncologist and patient, and Arm 3 is the control group, which receives access to information through a website. Primary outcome variables are DCG distress, anxiety, depression, burden, self‐efficacy, and emotional support. These data are collected electronically at baseline, 4 months, and 6 months. Patient distress, anxiety, and depression are also assessed at these same intervals using brief in‐person interviews. The change in each of the DCG outcomes over time will be examined by a repeated measures analysis of covariance.     

Effects of combined aerobic and resistance training in patients with heart failure: A meta‐analysis of randomized,controlled trials

Cardiac rehabilitation programs consisting of core features of exercise training for patients with heart failure have demonstrated a wide range of physical and psychological benefits. In study, a meta‐analysis of combined aerobic and resistance training was conducted on various outcomes in patients with heart failure. Database searches included EMBASE, PubMed, Medline, Cochrane Library, Web of Science, OVID, and CINAHL. Only randomized, controlled trials were included. Review Manager 5.3 software was used to perform the meta‐analysis. In total, 12 studies and 516 patients were included. The results demonstrated that combined aerobic and resistance training is effective in promoting exercise capacity, muscle strength, and 6 min walk distance. Furthermore, combined training significantly improves the quality of life of patients with heart failure. However, there was no significant difference found for outcomes of depression and sleep. Future studies with rigorous methodological designs and long‐term follow ups are recommended to evaluate the sustainable benefits of combined aerobic and resistance intervention programs.     

Regression equations to estimate the 2‐min walk distance in an adult Asian population aged 40–75 years

Background and objective

There is increased use of the 2‐min walk test (2MWT) to assess functional exercise capacity. However, the distance achieved during this test may be difficult to interpret in the absence of reference values from a local population. Regression equations to estimate the 2‐min walk distance (2MWD) only exist for American and Brazilian populations. The objective of this study was to develop regression equations to estimate the 2MWD in Malaysian adults who were free from major health problems.

Methods

Eighty‐seven adults (43 males; mean ± SD age: 57.1 ± 9.6 years) performed two 2MWT using a standardized protocol. Heart rate (HR) was recorded every 30 s during the test. Stepwise multiple regression analysis was performed using age, gender, height, weight and change in HR (ΔHR) as independent variables, and better of the two 2MWD as the dependent variable. A second regression equation, without ΔHR, was planned if ΔHR was retained as one of the predictors of the 2MWD in the first equation.

Results

The better of the two 2MWD was 200 ± 34 m. Males walked 33 ± 6 m further than females (P < 0.001). The two regression equations were 196 − 1.1 × age, years + 1.0 × ΔHR, bpm + 31.2 × gender (R² = 0.73) and 279 − 1.7 × age, years + 35.9 × gender (R² = 0.47) with females = 0 and males = 1.

Conclusion

The equations derived in this study may facilitate the interpretation of the 2MWD in clinical populations in Malaysia, as well as in countries with similar cultural backgrounds to Malaysia.